iStorage Server and IP SEC

iStorage Server and IP SEC
Friday, May 28, 2010

KernSafe Technologies, Inc.

www.kernsafe.com

Copyright © KernSafe Technologies 2006‐2009. All right reserved.

Table of Contents
1. iSCSI Target Setting ....................................................................................................................... 3
A) Create Target ..................................................................................................................... 3
B) iSCSI Target Setting ............................................................................................................ 7
2. Server Side Local Security Policy Setting ................................................................................... 13
3. Client Side Local Security Policy Setting .................................................................................... 30
4. Logging on to the target ............................................................................................................. 47
5. Effect ........................................................................................................................................... 52

KernSafe iStorage Server is an advanced and powerful, full‐featured software‐only iSCSI Target
that fully conforms to the latest iSCSI Standard 1.0 (former Draft 20). It is an IP SAN solution
allowing you to quickly export existing storages such as disk images, VHD files, physical disks,
partitions, CD/DVD‐ROMs, tapes or any other type of SCSI based devices and even a variety of
popular CD/DVD images to the client machines. The software thus delivers immediate benefits,
as it allows storage to be consolidated, virtualized and centrally managed. iStorage Server also
provides RAID‐1 (mirror) feature enabling you to create two iSCSI devices for mirror backup.
Furthermore, iStorage Server also supports a lot of features such as: VHD (Virtual Hard Disk)
target, snapshots, STPI, RAID‐1 and failover, these features are very important and poplar in
storage industry world and make iStorage Server is suitable for any size of business.

After iStorage Server 2.0, it supports server side mirroring, synchronous replication and failover
which allows user to create a high‐availability iSCSI SAN.

Internet Protocol Security (IPSec) is an architecture defined by the Internet Engineering Task
Force (IETF) RFC 2401. This architecture involves several protocols that perform various functions
in the architecture.

A network is not secure until servers can identify the computers communicating with them. IPSec
enables secure, trusted communications between IP addresses. The system behind the IP address
has an identity that is verified by using an authentication process. The only computers that must
be aware of IPSec are the sending and receiving computers. Each computer handles security at its
respective end, and assumes that the medium over which the communication takes place is not
secure. Any computers that route data between the source and destination computer are not
required supporting IPSec.

This article demonstrates how to make a Security iSCSI Target under the Windows IP Security
Policies (IP Sec) environment by using KernSafe iStorage Server. Take Windows Server 2003 as an
example, It is also similar to Windows 2000, Windows XP, Windows Vista and Windows Server
2008. At the same time, this article demonstrates how to use the two method of security policy
in the iStorage Server, CHAP and IP Address authentication mechanism and how to configurate
Local Security Policy in the both client and server side.

1. iSCSI Target Setting
A) Create Target
Launch KernSafe iStorage Server Management Console，Select Storage ‐> Create Target menu
item, the Create Target wizard is shown.

Choose Hard Disk.

Press the Next button to continue.

Choose Image File in iSCSI Medium Type window.

Then press Next button to continue.

We choose Standard Image File and then press Next button.

Set image disk parameters

Select Create a new image file or Use existing image file if you already have a one.

Specify the device size.


Set Authorization Mode.

Choose authorization mode as you required.


Finish iSCSI Target Creating.

Type the target name or use the default name.

Press the Finish button to continue.

B) iSCSI Target Setting
This chapter is not necessary for every users of iStorage Server.

Back to iStorage Server Management Console.

B1. Modify iSCSI Target authorization method. User may modify iSCSI Target settings by through
this method. Right click on the Target node, and then select the Properties menu item, the
Target Settings dialog is shown.

In General page, you can change the target name and expand the capacity of the target when it is
a standard image file. The commit button is only available for RAM target.

In the Device Settings Page, if you check “Report as readonly device when initiator can not get
write access”, the system will give you a report when you load the target without write access.

When your storage server is running in the environment of cluster, the function of concurrent
writing of multi‐users is needed and the writing synchronization control is realized by cluster
software. Thus, you need to check ”Enable multiple initiators with full access connected”

In the Security page, you can change the target’s authorization mechanism.

In the Portal page, when you check “Inherit from global settings” the settings will follow the
“Settings” in tool bar, otherwise, you can have your own portal address for this target.

If you want to speed up the read and wire rate, check Enable cache on this target in the Cache
page.

If you want your target has the COW protection, check the “Enable Virtual Write” in the Virtual
Write page.

Once user selected IP filter authorization, he can manage this target’s access right by IP filter.
Click the View‐>IP Filters on the toolbar or click IP Filters on the left tree of the main interface.

Click the Add button on the Toolbar, the Add clients to IP filter dialog is shown.

Any: Indicate all of the clients connected to the target have the same access right.
IP Address: Indicate the IP address has the given access right.
IP Range: Indicate the clients specified by the range has the given access right.

Press the OK button to add an IP filter item.

User can modify IP filter item’s access right, Read Only, Refuse, Virtual Write and Full Access, or
remove some IP filter items if they are not needed.

2. Server Side Local Security Policy Setting
Click “Start ‐> Control Panel ‐> Administrative Tools ‐> Local Security Policy” open the “Local
Security Settings Management Console.

Select the IP Security Policies on Local Computer, right click on the blank of right panel, then
select the Create IP Security Policy menu item, the IP Security Policy Wizard is shown.


Type IP Security Policy Name

Type “KernSafe IP Security Policy”.


Specify how this policy responds to requests for secure communication.

Do not select Activate the default response rule.


Completing the IP Security Policy Wizard

Select the Edit properties by default.

Press the Finish to continue.

Then the KernSafe IP Security Policy Properties dialog is shown.

Do not select Use Add Wizard.

Press the Add button, the New Role Properties dialog is shown.

Press the Add button, the IP Filter List dialog is shown.

Input IP Filter name.

Type KernSafe in the Name and do not select Use Add Wizard.

Press the Add button to continue.

Select Any IP Address in the Source address.

Select My IP Address in the Destination address.

Then change to the Protocol page.

Select TCP in Select a protocol type field.

Type 3260 in the To this port.

Press the OK button to continue.

Select the KernSafe IP Filter item which we just created and change to Filter Action page.

Select Require Security and then change to Connection Type page.

Select the All network connections, and then change to Tunnel Setting page.

Select This rule does not specify an IPSec tunnel, and then change to Authentication Methods
page.

Select Kerberos, press the Edit button, the Edit Authentication Method Properties dialog is
shown.

Select Use this string (preshared key）, type the preshared key, we take “123” as an example.

Press the Apply button to save settings and press the Close button to close this dialog.

Check KernSafe in the IP Filter List and then press the OK button to continue.

Back to Local Security Settings main interface.

Right click on the KernSafe IP Security Policy item and then select Assign to make this item
enabled.

3. Client Side Local Security Policy Setting
Open Start ‐> Control Panel ‐> Administrative Tools ‐> Local Security Policy, The Local Security
Settings Console is shown.

IP Security Policies on Local Computer and right click on the blank of the right panel. Then select
Create IP Security Policy. The IP Security Policy Wizard is shown.


Enter IP Security Policy Name

Type “KernSafe IP Security Policy”.

Press the Next button to continue。

Specify how this policy responds to requests for secure communication.

Don’t select the “Activate the default response rule”.


Completing the IP Security Policy Wizard.

Select the Edit properties.
Press the Finish button to continue.

The KernSafe IP Security Policy Properties Dialog will be shown.

Don’t select the Use Add Wizard option.

Press the Add button, the New Rule Properties dialog is shown.

Press the Add button to continue.

Setting IP Filter List.

Type the name of IP filter.

Don’t select the Use Add Wizard option.

Press the Add button, the IP Filter Properties dialog is shown.

Select My IP Address in Source address Categories.
Select A specific IP Address in Destination address categories, and then type the IP address of
your server machine.
Select the Protocol page to continue.

Set protocol properties.

Select TCP in the Select a protocol type categories, and then type 3260 in the To this port.

Now we come back to the IP Filter List interface.

Press the OK button to complete the IP Filter Item creation.

Select the KernSafe IP Filter item we just create. Change to Filter Action page.

Select Require Security.
Change to Connection Type page.

Select All network connections.
Change to Tunnel Setting page.

Select This rule does not specify an IPSec tunnel.
Change to Authentication Methods page.

Select Kerberos.
Press the Edit button, the Edit Authentication Method Properties dialog is shown.

Select Use this string (preshared key), then type 123 or other text as password in the input box.
Press the OK button to apply.

Press the Apply button and then press the Close button to close this dialog.

Select KernSafe IP Filter item and then press the OK button.

Back to the Local Security Settings Console main interface

Select IP Security Polices on Local Computer and then right click on the blank of right panel.
Select the Assign menu item in the popup menu to make this item enabled.

4. Logging on to the target

Open Microsoft Initiator

Select the Discovery tab page.

Press the Add button in the Target Portals, the Add Target Portal dialog is shown.

Type the IP address and port of your server.


Select the target in the Targets list, and then press the Log On button.

Then the Log On to Target dialog is shown.

If your iSCSI target using IP filter authorization, just press the OK button to continue.

If your iSCSI target using CHAP user authorization, press the Advance button, the Advanced
Settings dialog is shown.

Select CHAP login information and type User name and Target secret.


When the connection is created, you will see the connection in the Status column.
Now, you may operation the iSCSI disk just as a normal disk.

5. Effect
TCP/IP online traffic when not using IP SEC.

We will “see” all the information when initiators communication with targets.

TCP/IP online traffic when using IP SEC.

All the information is encrypted.

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